Image caption Mr Simionov was stabbed outside the private party in Park Lane

The jury heard Mr Simionov was stabbed in the chest and five other members of staff were injured as a group of gatecrashers tried to get into the exclusive party.

Barber Nor Hamada, 33, from Wembley, was on trial accused of murder, violent disorder and five counts of wounding.

He was found guilty of violent disorder and cleared of four counts of wounding, but the jury were unable to reach verdicts for the murder and fifth wounding charge.

Following the judge’s decision to discharge the jury, the prosecution asked for more time to consider whether to seek a retrial on the outstanding charges.

Image copyrightMet Police

Image caption The court heard Ossama Hamed remains at large having fled the country a day after the killing

At the start of the trial Adam Khalil, 21, from Kingsbury, and Haroon Akram, 26, from Fulham, both pleaded guilty to manslaughter, while Ahmed Munajed, 26, from Hammersmith, admitted violent disorder.

Two others were acquitted by the jury.

Adham El Shalakany, 24, from Hammersmith, was cleared of violent disorder and Shaymaa Lamrani, 26, of Ealing, who was accused of throwing away the knife used in the attack, was found not guilty of perverting the course of justice.

The court was told the fatal blow is thought to have been inflicted by Ossama Hamed, 26, from Hillingdon, but he remains at large having fled the country a day after the killing.